It might just be that because I have it in my phone, the transfer rate is slower, but it does take a while to transfer files to and from the microSD card. But it's convenient enough as portable memory in my phone which can store up to 250 mp3 files, picture files, video files, or anything else I might want to store on my phone. I kind of wiish that I upgraded to the 2 GB or 4 GB size though since if that were the case I would never have to worry about the memory on my phone. But for most intents and purposes, 1GB is more than enough to store some music. The size is one thing to be concerned about though. It's not something you want to keep putting in and taking out as it's so small it's ridiculously easy to lose track of where it is or the possibility of breaking.